CI/CD turns deployment from a manual, anxious ritual into an automated, repeatable pipeline. Continuous Integration merges code changes frequently and tests them; Continuous Delivery makes every change releasable.
The pipeline is a set of stages your code passes through on the way to production.
Continuous Integration (CI)
Every push to the main branch triggers automated build and tests.
- Catches integration problems when they are small.
- Makes the main branch always deployable.
- Fast feedback keeps quality high.
Continuous Delivery and Deployment
Delivery keeps the pipeline ready so a human can release any commit. Deployment automates the final release entirely.
- CD pipeline: build, test, review, then deploy to a staging environment.
- Production deployment can be manual (delivery) or automatic (deployment).
Start with CI only: build and test on every push. Add delivery once that runs reliably. Full auto-deploy is a later maturity stage, not the first goal.
The core pipeline stages
A standard pipeline looks like this: checkout, build, unit tests, static analysis, integration tests, artifact publishing, and a deploy step.
Make the pipeline fast. If tests take an hour, developers stop running them.
CI/CD FAQ
Do I need CI/CD for a small project?
A minimal pipeline (lint, build, test, deploy) still pays off by making releases routine. Even solo projects benefit.
What is the difference between CI and CD?
CI covers building and testing on every change. CD covers getting those changes released. Delivery is one more step than deployment: a human gate.
